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Proceedings Paper

Active spectrographs: a new way to improve their quality
Author(s): Rajiv K. Bhatia
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Paper Abstract

We discuss the various errors affecting an astronomical spectrograph, whether mounted directly at the telescope, or placed on a table. We then propose a method for measuring these errors, using the Shack-Hartmann principle, which has been successfully used in the field of active and adaptive optics. It is argued that such a measurement can be used to correct the aberrations on-line, leading to considerable improvement in the performance of the spectrographs, as well as leading to much reduced costs.

Paper Details

Date Published: 1 June 1994
PDF: 5 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176686
Show Author Affiliations
Rajiv K. Bhatia, Telescopio Nazionale Galileo/Osservatorio Astronomico di Padova (Italy)

Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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